p-Block Elements PYQs Set 14 (PDF)

Set 14 of 15 · Questions 391-420 of 423

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Mere Teacher · Previous Year Questions JEE Main Chemistry · p-Block Elements · Set 14 (Q391-420)
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391. $Which among the following elements of group-2 exhibits anomalous properties?$ (1) $Be$ (2) $Mg$ (3) $Ca$ (4) $Ba$ 392. $Consider the following reaction : 2 HSO_{4}^{-} (a q) (1) Electrolysis (2) Hydrolysis 2 HSO_{4}^{-} + 2 H^{+} + A The dihedral angle in product A in its solid phase at 110K is:$ (1) $104°$ (2) $111.5°$ (3) $90.2°$ (4) $111.0°$ 393. $Identify X, Y and Z in the following reaction, (Equation not balanced) Cl O ∙ + NO_{2} \to X H_{2} O Y + Z$ (1) $X= C 1 O N O_{2}, Y=HOC1, Z = N O_{2}$ (2) $X= C 1 N O_{2}, Y=HC1, Z= H N O_{3}$ (3) $X= C 1 O N O_{2}, Y=HOC1, Z= H N O_{3}$ (4) $X= C 1 N O_{3}, Y= C 1_{2}, Z= N O_{2}$ 394. $Identify the correct formula of ‘oleum’ from the following$ (1) $H_{2} S_{2} O_{7}$ (2) $H_{2} S O_{3}$ (3) $H_{2} S O_{4}$ (4) $H_{2} S_{2} O_{8}$ 395. $The correct order of increasing bond angles in the following species is$ (1) $C 1_{2} O < C l O_{2} < C l O_{2}^{-}$ (2) $C l O_{2} < C 1_{2} O < C l O_{2}^{-}$ (3) $C 1_{2} O < C l O_{2}^{-} < C l O_{2}$ (4) $C l O_{2}^{-} < C 1_{2} O < C l O_{2}$ 396. $Sulphur trioxide can be obtained by which of the following reaction :$ (1) $CaSO4 + C$ (2) $Fe2 (SO4)3$ (3) $S + H2SO4$ (4) $H2SO4 + PCl5$ 397. $Which is the correct statement for the given acids?$ (1) $Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.$ (2) $Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.$ (3) $Both are diprotic acids.$ (4) $Both are triprotic acids.$ 398. $"A" obtained by Ostwald's method involving air oxidation of N H_{3}, upon further air oxidation produces "B". "B" on hydration forms an oxoacid of Nitrogen along with evolution of "A". The oxoacid also produces "A" and gives positive brown ring test$ (1) $N O_{2}, N_{2} O_{5}$ (2) $N O_{2}, N_{2} O_{4}$ (3) $NO, N O_{2}$ (4) $N_{2} O_{3}, N O_{2}$ 399. $Some reactions of N Q_{2} relevant to photochemical smog formation are Identify A, B, X and Y$ (1) $X = [O], Y = NO, A = O_{2}, B = O_{3}$ (2) $X = N_{2} O, Y = [O], A = O_{3}, B = NO$ (3) $X = \frac{1}{2} O_{2}, Y = N O_{2}, A = 0_{3}, B = O_{2}$ (4) $X - NO, Y - [O], A - 0_{2}, B = N_{2} O_{3}$ 400. $The geometry around boron in the product ' B^{1} formed from the following reaction is B F_{3} +NaH 450 K A + NaF A + N M e_{3} \to B$ (1) $trigonal planar$ (2) $tetrahedral$ (3) $pyramidal$ (4) $square planar$ 401. $Identify the incorrect statement, regarding the molecule X e O_{4} :$ (1) $X e O_{4} molecule is square planar.$ (2) $There are four p π - d π bonds.$ (3) $There are four s p^{3} ‐p, 0 bonds.$ (4) $X e O_{4} molecule is tetrahedral.$ 402. $Which of the following oxoacids of sulphur contains "S" in two different oxidation states?$ (1) $H_{2} S_{2} O_{3}$ (2) $H_{2} S_{2} O_{6}$ (3) $H_{2} S_{2} O_{7}$ (4) $H_{2} S_{2} O_{8}$ 403. $Among the given oxides of nitrogen; N_{2} 0, N_{2} O_{3}, N_{2} O_{4} and N_{2} O_{5}, the number of compound/(s) having N-N bond is :$ (1) $1$ (2) $2$ (3) $3$ (4) $4$ 404. $The number of S-O bond in S_{2} O_{8}^{2 -} and number of S-S bond in Rhombic Sulphur are respectively :$ (1) $8, 8$ (2) $6, 8$ (3) $2, 4$ (4) $4, 2$ 405. $Which of the following bonds has the highest energy?$ (1) $SS$ (2) $OO$ (3) $SeSe$ (4) $TeTe$ 406. $Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid. [A] and [B] are respectively$ (1) $P_{4} O_{6} and H_{3} P O_{3}$ (2) $P C l_{3} and H_{3} P O_{3}$ (3) $P C 1_{5} and H_{3} P O_{4}$ (4) $P O C l_{3} and H_{3} P O_{4}$ 407. $Given below are two statements : one is labeled as Assertion A and the other is labelled as Reason R. Assertion A : Boric acid is a weak acid Reason R : Boric acid is not able to release H^{+} ion on its own. It receives O H^{-} ion from water and releases H^{+} ion. choose the most appropriate answer from the options given, below.$ (1) $Both A and R are correct and R is the correct explanation of A$ (2) $Both A and R are correct but R is NOT the correct explanation of A$ (3) $A is correct but R is not correct$ (4) $A is not correct but R is correct$ 408. $P4O10 is not used to dry NH3 gas because :$ (1) $P4O10 reacts with moisture in NH3$ (2) $P4O10 is not a drying agent$ (3) $P4O10 is acidic and NH3 is basic$ (4) $P4O10 is basic and NH3 is acidic$ 409. $Pure nitrogen is prepared in the laboratory by heating a mixture of$ (1) $N H_{4} O H + N a C l$ (2) $N H_{4} N O_{3} + N a C l$ (3) $N H_{4} C l + NaOH$ (4) $N H_{4} C l + N a N O_{2} .$ 410. $Match the Xenon Compounds in Column-I with its structure in Column-II And Assign the Correct Code: Column-I (A) XeF_{4} (B) XeF_{6} (C) XeOF_{4} (D) XeO_{3} Column-II (I) Pyramidal (II) Square planar (III) Distorted octahedral (IV) Square pyramidal$ (1) $(A)-(I); (B)-(II); (C)-(III); (D)-(IV)$ (2) $(A)-(II); (B)-(III); (C)-(IV); (D)-(I)$ (3) $(A)-(II); (B)-(III); (C)-(I); (D)-(IV)$ (4) $(A)-(III); (B)-(IV); (C)-(I); (D)-(II)$ 411. $Number of Cl=0 bonds in chlorous acid, chloric acid and perchloric acid respectively are:$ (1) $3,1 and 1$ (2) $4,1 and 0$ (3) $1,1 and 3$ (4) $1,2 and 3$ 412. $Consider the following reaction Here, X, Y and Z respectively, are$ (1) $X e F_{2}, X e F_{6}, X e F_{4}$ (2) $X e F_{2}, X e F_{4}, X e F_{6}$ (3) $X e F_{4}, X e F_{2}, X e F_{6}$ (4) $X e F_{6}, X e F_{4}, X e F_{2}$ 413. $On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives A and B while its reaction with HC1 produces B and C. A, B and C are, respectively$ (1) $HOC1, H N O_{3}, C 1_{2}$ (2) $C 1_{2}, H N O_{3}, HOC1$ (3) $H C 1 O_{2}, H N O_{2}, HOC1$ (4) $HOC1, H N O_{2}, C 1_{2} O$ 414. $P_{2} O_{5} is heated with water to give$ (1) $hypophosphorous acid$ (2) $phosphorous acid$ (3) $hypophosphoric acid$ (4) $orthophosphoric acid.$ 415. $A chloride salt solution acidified with dil. H N O_{3} gives a curdy white precipitate, [A], on addition of A g N O_{3} . [A] on treatment with N H_{4} OH gives a clear solution, B.$ (1) $H[A g C l_{3}] & [Ag (N H_{3})_{2}]Cl$ (2) $H[A g C l_{3}] & (N H_{4})[Ag (O H)_{2}]$ (3) $AgCl & [Ag (N H_{3})_{2}]Cl$ (4) $AgCl & (N H_{4})[A_{g} (O H)_{2}]$ 416. $Sugarcane on reaction with nitric acid gives$ (1) $C O_{2} and S O_{2}$ (2) $(C O O H)$ (3) $2 H C O O H (two moles)$ (4) $no reaction.$ 417. $In which pair of ions both the species contain S — S bond?$ (1) $S_{4} O_{6}^{2 -}, S_{2} O_{3}^{2 -}$ (2) $S_{2} O_{7}^{2 -}, S_{2} O_{8}^{2 -}$ (3) $S_{4} O_{6}^{2 -}, S_{2} O_{7}^{2 -}$ (4) $S_{2} O_{7}^{2 -}, S_{2} O_{3}^{2 -}$ 418. $Consider the following sulphure based oxoacids. H_{2} S O_{3}, H_{2} S O_{4}, H_{2} S_{2} O_{8} and H_{2} S_{2} O_{7} . Amongst these oxoacids, the number of those with peroxo(O-O) bond is______.$ 419. $Consider the following reactions : P C 1_{3}_{+} H_{2} O \to A + HC1 A_{+} H_{2} O \to B + HC1 number of ionisable protons present in the product B _______.$ 420. $The oxidation sate of phosphorus in hypophosphoric acid is + ___________$